--  @owner:opentestcase005
--  @date:2020/8/11
--  @testpoint:创建函数添加参数COST，估计函数的执行成本是0.0025
drop FUNCTION if EXISTS u_testfun1(c_int int);
CREATE FUNCTION u_testfun1(c_int int) RETURNS int  AS $$
        BEGIN
                RETURN (c_int);
        END;
$$ LANGUAGE plpgsql
STRICT
COST 0.0025;
/
drop FUNCTION u_testfun1;